Noun | 1. | ![]() slit lamp - (ophthalmology) a lamp that emits a narrow but intense beam of light that enables an ophthalmologist, using a microscope, to view the retina and optic nerve medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques ametropia - (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia emmetropia - (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina myopia, nearsightedness, shortsightedness - (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred astigmatism, astigmia - (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people |